blanchard



(N oMo'el.) 2 sheetssheen 1.

V. W. BLANCHARD.

' GRATB FOB. PURNAGES. Y Y f No. 413,898. yPatented om.. 29. 1889.

n PETERS. Phomumegnpn'r. wmninglon n. u

No Model.) 2 sheets-sheen 2.

\ V. W. BLA HARD. @RATE FOR F AGES.

No. 413,898. Patented Oct. .29., 1889.

I Fay/L.

fllllliii inummnnli UNITED STATES PATENT OFFICE.

VIRGIL YV. BLANCHARD, OF NEW YORK, N. Y., ASSIGNOR TO JOSEPH A.

DAVIS, OF SAME PLACE.

GRATE FOR FU RNACES.

SPECIFICATION forming part of Letters Patent No. 413,898, dated October 29, 1889.

Application filed April 4, 1889. Serial No. 305,968. (No model.)

To @ZZ whom it may concern:

Beit known that I, VIRGIL W. BLANCHARD, of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Grates for Furnaces; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification', in which- Figure l is a perspective sectional view ofa portion of my improved grate and portions of the bearers or frame therefor. Fig. 2-is an elevation in detail, and partly in section, of a portion of the grate. Fig. 3 is lthe perspective view of one of the sections of the rocking bars. Fig. 4; shows one of the connectinglinks for the lower pivotal rods of said bars.V

my improved grate.

The rocking bars of the grate are composed of sections arranged in parallel rows between stationary bars B, vwhich are suitably supported at their extremities upon or by the furnace-brick lining. The stationary bars B may constitute a rigid frame, within which the bars A are allowed to be rocked. Each one of the sections of the movable bars A is constructed with an enlarged crushing-head A', preferably of the angular form shown in Figs. l and 3, in the sides of which head are grooves a a. Below the head A is an eye d, through which passes a fulcrum pivotal rod D, and below this eye d the section is contracted laterally and provided on one side with an oblong tenon b and on the opposite side with a mortise h', of a corresponding shape and size to that shown'in Fig. 2. The lower or lever path of each section A is provided with ribs c c, below which is an eye d', for receiving a pivotal connecting-bar E. Each row of sections forming bars A are Iclosely itted together, and are locked by the tenons and mortises above described. The curved grooves in the sides of adjoining sections A form passageso/ for admitting air from the ash-pit in jets to the fuel on the grate. The air is thus admitted through the bars, as well as between them, thereby insuring a more thorough and even distribution of the air and oxidation of the fuel.

Each row of sections A vibrates about a fulcrum-rod D, and all of the rows of sections are connected together by links G, through which pass the pivotal rods E, so that all of the said bars A can be rocked simultaneously by means of a rod O, .which in practice will be connected to an angular lever. (Not shown in the drawings.)

The stationary bars, which are arranged between the movable bars, are constructed with double beveled heads having grooves c in them, and below these heads the bars are in `crosssection bifurcated, as shown in Fig. l, leaving inverted-V-shaped grooves B2 longitudinally through them. These grooves B2 trap air, which keeps the bars from melting or sagging.

It will be observed that l have a grate by which clinkers can be easily crushed to powder, and that by means of the small passages a air will be at all times supplied to the fuel in jets sufiicient to maintain combustion of the fuel. y

Having described my invention, I claiml. 'lhe combination, in a grate, of stationary bars with intermediate rocking bars having crushing-heads provided with a series of airpassages, for the purpose and substantially as described.

2. In agrate, the combination of stationary bars having double beveled heads, with a series of intermediate rocking bars having double beveled Vheads formed with air-passages, whereby air is admitted through the bars, substantially as and for the purpose specied.

3.V In a grate constructed with movable bars, the combination therewith of longitudinally- IOO grooved stationary bars having double bcveled and grooved heads and longitudinally grooved on their under surfaces, substantially as described.

4:. The movable hammer-headed bars composed of sections locked together and provided With air-jet passages, as described, in combination with the stationary bars, as speciied.

5. The combination, with a series of stationary bars, of a series of rocking bars parallel with and between the stationary bars, said rocking bars being composed of sections fitted together bytongue-and-socket joints and provided with coincident grooves forming airpassages, substantially as described.

6. The combination of a series of stationary bars having double inclined and grooved upper edges with a series of rocking bars alternating with said stationary bars and having enlarged and perforated heads and depending shanks, and the uniting-links between said rocking bars for operating them simultaneously substantially as set forth.

7. The combination, with the stationary bars, of intermediate rocking bars 'composed of sections fitted together upon a supportin g-rod, and having enlarged heads channeled on their meeting edges, and depending shauks, the rods passing through said Shanks, and the links connecting said rods for operating the rocking bars, substantially as specified.

8. The combination of the grate-bars having inclined upper edges and longitudinally channeled or grooved, with a series of rocking bars composed of similar sections having enlarged heads grooved on their meeting faces, and tongues and sockets for locking the adjoining sections together, and the links and rods for rocking said bars, substantially as described.

9. The herein-described grate, composed of a series of stationary bars having a longitudinal channel at bottom and their upper edges beveled and grooved, with a series of rocking bars composed of similar sections .fitted on a suspending-rod, each section having an enlarged double beveled head channeled on its sides,`and a tongue and socket on its depending portion orv shank, and a laterally-'perforated eye, and the rods passing through said eyes, the links connecting said rods, and the' operating-rod for rocking the bars, all substantially as and for the purpose specified. l

In testimony that I claim the foregoing as my oW'n I aiiix my signature in presence of two Witnesses.

W. R.`KEYWORTH, F. O. MCCLEARY.

so f- 

